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Instant messaging method and system for user mode encryption

A communication method and user-mode technology, applied in the field of information security, can solve the problems that user privacy cannot be truly protected, service providers cannot be guaranteed, etc., to eliminate the possibility of viewing user communication information, convenient key management, and strong security Effect

Active Publication Date: 2017-05-31
INST OF SOFTWARE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are limitations in the encryption schemes employed by existing instant messaging systems: in these encryption schemes, the message key is visible to the server
Since the instant messaging server is owned by the service provider and its operation is not controlled by the user, the user cannot guarantee that the service provider will not access the content of the user's communication for commercial or other reasons, so the user's privacy cannot be truly protected

Method used

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  • Instant messaging method and system for user mode encryption
  • Instant messaging method and system for user mode encryption
  • Instant messaging method and system for user mode encryption

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Embodiment Construction

[0064] The features of various aspects of the present invention will be described in detail below without limiting the scope of the present invention in any way.

[0065] The instant messaging method of the user state encryption of the present embodiment is realized by the client and the server, figure 1 is its system structure diagram, including the following steps:

[0066] A. User registration: record the user number as i, and register the user feature key FK for user i i And a pair of public and private keys PK i 、SK i ; The user registration process is as follows figure 2 shown;

[0067] B. Single chat: the single chat message transmission process is as follows Figure 4 As shown, the message sender is user a, and the message receiver is user b. a randomly constructs a key k for message encryption;

[0068] C.a accesses the server to read the public key PK of b b ;

[0069] D.a use PK b Encrypt k to get AEnc(k,PK b );

[0070] E. Remember that the content of ...

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Abstract

The invention discloses an instant messaging method and system for user mode encryption. A user controllable encryption technology is used for protecting the instant messaging information of a user, and the personal privacy of the user can be effectively protected. The principle of the system is to construct a set of user unique feature password, and to encrypt the messaging information of the user based on the password, thereby guaranteeing that only the lawful owner of the password can decrypt the information. The specific processes are as follows: (1) initializing; (2) message encrypting; (3) message transmitting; and (4) message decrypting. The system comprises a server-side and a plurality of clients, wherein the clients are connected with the server-side through the network. The system has the advantages that the security is high, the information content transmitted by the user cannot be obtained by a messaging server, the efficiency is high, and the messaging efficiency consistent with the similar unencrypted product is provided.

Description

technical field [0001] The invention relates to the related field of computer software, in particular to an instant messaging method and system encrypted in a user state. It belongs to the field of information security technology. Background technique [0002] Instant Messaging (IM for short) is an Internet-based instant communication method, which allows two or more people to use the network to transmit text messages, files and even realize voice and video communication in real time. At present, there are many instant messaging systems at home and abroad, among which QQ, WeChat, WhatsApp, Skype, etc. have a relatively high market share. But with the popularization of users, huge potential benefits began to emerge, and the instant messaging system also began to become the target of hackers and viruses. The survey also shows that Internet users are paying more and more attention to their privacy, and developers have also begun to develop more secure instant messaging system...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L9/08H04L12/58
CPCH04L9/0866H04L51/04H04L63/045
Inventor 洪澄迟佳琳惠榛付艳艳李昊张敏冯登国
Owner INST OF SOFTWARE - CHINESE ACAD OF SCI
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